Today, sacred travel is more popular than it has been since the Middle Ages. Each year, millions of people travel to the world's holy sites, and one of the most popular destinations is Santiago de Compostela in the Northwest corner of Spain. Burt Wolf tours its 1, 000-year-old Cathedral and explains the stories behind its art and architecture and watch as an eight-man team swings the world's largest flying incense burner through the structure. We see the world's oldest travel guide, and visit the Hospital of the Kings of Spain that was built in 1499---the world's oldest hotel still in operation. We also call on a jeweler who works in Jet, an ancient gemstone so black that describing it caused the phrase "jet black" to become part of the English language. It is a city that can connect you with the divine.